Danfoss VLT AAF00x, Инструкция по эксплуатации

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WARNING 251, New type code
The power card or other components have been replaced
and the type code changed. Reset to remove the warning
and resume normal operation.
ALARM 300, Mains cont. fault
Line power contactor fault is displayed when the feedback
signal indicates that the contactor is not in the expected
state, i.e., either the contactor could not be closed or could
not be opened, or that the feedback signal itself is wrong.
Troubleshooting:
Control and feedback wiring check
Verify that the control and feedback wiring is correct and
that the electrical connections are tight. The 24 VDC
output of the control card is taken from terminal 12, and
the contactor feedback comes back to terminal 32. The
contactor is energized from a control transformer through
the power card relay. Perform a visual inspection to verify
there is no physical damage to the wire insulation. This
should be done for the control and for the feedback
wiring. Perform a continuity check to test for wire
breakage.
Perform the Control Card Digital Inputs/Outputs Test ().
Contactor test
Perform a continuity test of the contactor between the
input terminal and output terminals. If continuity is
detected, than the contactor fuse must be replaced. There
should also be no continuity between any two test points
of the three phases for either the input or the output side.
Loss of line power
A loss of AC line voltage will cause the contactor to open.
Check the line power supply and consider employing auto
reset.
Other
If none of the above tests have identified the problem,
replace the power card.
ALARM 301, SC cont. fault
Soft charge contactor fault results when the feedback
signal indicates that the contactor is not in the expected
state, that is, either the contactor could not be closed or
could not be opened, or that the feedback signal itself is
wrong.
Update to software versions 1.7 or later.
Troubleshooting:
Perform tests as listed in Alarm 300, main contactor tests.
WARNING/ALARM 302, Cap. overcurrent
Excessive current was detected through the AC capacitors
of the LCL filter.
See for current trip points.
Troubleshooting
•
Check that the nominal voltage parameter
(300-10) is set correctly. If the nominal voltage
parameter is set to Auto, change this parameter
to nominal voltage of the installation.
•
Check that the CT parameter placement
(parameter 300-26) corresponds to the installation
•
Perform the Line Power Resonance Test ()
WARNING/ALARM 303, Car. earth fault
A ground fault was detected in the LCL filter AC capacitor
currents. The summed currents in the LCL filter CTs
exceeds the power unit dependent (PUD) level.
Troubleshooting:
•
Turn off the filter
•
Measure the resistance to ground of the LCL filter
components leads with a megohmmeter to check
for ground faults
•
Perform AC capacitors and current transducers
test ().
•
Check that the connectors on current transducers
and on the AFC card are pinned properly
•
Check AC capacitors current transducers cables
•
Replace the AFC card
WARNING/ALARM 304, DC overcurrent
Excessive current through the DC link capacitor bank was
detected in the IGBT current sensors.
Troubleshooting
•
Check the electrical fuses and ensure that all
three line phases are powered
•
Check that the CT parameter placement
(parameter 300-26) corresponds to the installation
•
Perform the Line Power Resonance Test ()
ALARM 305, Mains. freq. limit
The line power frequency was outside the limits (50 Hz–60
Hz) +/-10%. Verify that the line power frequency is within
product specification. The alarm may also indicate loss of
line power for 1 - 3 electrical cycles.
The active filter must synchronize to the AC line voltage in
order to regulate the DC link voltage and inject compen-
sating current. The active filter utilizes a phase-locked loop
(PLL) to track the AC line voltage frequency.
When the active filter starts, the PLL uses the LCL filter AC
capacitor currents from the current transducers to initialize
for a period of 200 ms. After the PLL initialization period,
the active filter inverter will then start switching, the line
power estimated voltage is used instead of the capacitor
currents as input to the PLL. The PLL is not tolerant of
incorrect wiring or placement of the AC capacitor current
transducers.
Troubleshooting VLT Active Filter AAF 00x
9-8 MG.90.V2.22 - VLT
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